1 /*===- InstrProfilingBuffer.c - Write instrumentation to a memory buffer --===*\
2 |*
3 |* The LLVM Compiler Infrastructure
4 |*
5 |* This file is distributed under the University of Illinois Open Source
6 |* License. See LICENSE.TXT for details.
7 |*
8 \*===----------------------------------------------------------------------===*/
9
10 #include "InstrProfiling.h"
11 #include "InstrProfilingInternal.h"
12
13 #include <string.h>
14
15 COMPILER_RT_VISIBILITY
__llvm_profile_get_size_for_buffer(void)16 uint64_t __llvm_profile_get_size_for_buffer(void) {
17 const __llvm_profile_data *DataBegin = __llvm_profile_begin_data();
18 const __llvm_profile_data *DataEnd = __llvm_profile_end_data();
19 const uint64_t *CountersBegin = __llvm_profile_begin_counters();
20 const uint64_t *CountersEnd = __llvm_profile_end_counters();
21 const char *NamesBegin = __llvm_profile_begin_names();
22 const char *NamesEnd = __llvm_profile_end_names();
23
24 return __llvm_profile_get_size_for_buffer_internal(
25 DataBegin, DataEnd, CountersBegin, CountersEnd, NamesBegin, NamesEnd);
26 }
27
28 #define PROFILE_RANGE_SIZE(Range) (Range##End - Range##Begin)
29
30 COMPILER_RT_VISIBILITY
__llvm_profile_get_size_for_buffer_internal(const __llvm_profile_data * DataBegin,const __llvm_profile_data * DataEnd,const uint64_t * CountersBegin,const uint64_t * CountersEnd,const char * NamesBegin,const char * NamesEnd)31 uint64_t __llvm_profile_get_size_for_buffer_internal(
32 const __llvm_profile_data *DataBegin, const __llvm_profile_data *DataEnd,
33 const uint64_t *CountersBegin, const uint64_t *CountersEnd,
34 const char *NamesBegin, const char *NamesEnd) {
35 /* Match logic in __llvm_profile_write_buffer(). */
36 const uint64_t NamesSize = PROFILE_RANGE_SIZE(Names) * sizeof(char);
37 const uint8_t Padding = __llvm_profile_get_num_padding_bytes(NamesSize);
38 return sizeof(__llvm_profile_header) +
39 PROFILE_RANGE_SIZE(Data) * sizeof(__llvm_profile_data) +
40 PROFILE_RANGE_SIZE(Counters) * sizeof(uint64_t) + NamesSize + Padding;
41 }
42
43 /* The buffer writer is reponsponsible in keeping writer state
44 * across the call.
45 */
bufferWriter(ProfDataIOVec * IOVecs,uint32_t NumIOVecs,void ** WriterCtx)46 static uint32_t bufferWriter(ProfDataIOVec *IOVecs, uint32_t NumIOVecs,
47 void **WriterCtx) {
48 uint32_t I;
49 char **Buffer = (char **)WriterCtx;
50 for (I = 0; I < NumIOVecs; I++) {
51 size_t Length = IOVecs[I].ElmSize * IOVecs[I].NumElm;
52 memcpy(*Buffer, IOVecs[I].Data, Length);
53 *Buffer += Length;
54 }
55 return 0;
56 }
57
__llvm_profile_write_buffer(char * Buffer)58 COMPILER_RT_VISIBILITY int __llvm_profile_write_buffer(char *Buffer) {
59 return llvmWriteProfData(bufferWriter, Buffer, 0, 0);
60 }
61
__llvm_profile_write_buffer_internal(char * Buffer,const __llvm_profile_data * DataBegin,const __llvm_profile_data * DataEnd,const uint64_t * CountersBegin,const uint64_t * CountersEnd,const char * NamesBegin,const char * NamesEnd)62 COMPILER_RT_VISIBILITY int __llvm_profile_write_buffer_internal(
63 char *Buffer, const __llvm_profile_data *DataBegin,
64 const __llvm_profile_data *DataEnd, const uint64_t *CountersBegin,
65 const uint64_t *CountersEnd, const char *NamesBegin, const char *NamesEnd) {
66 return llvmWriteProfDataImpl(bufferWriter, Buffer, DataBegin, DataEnd,
67 CountersBegin, CountersEnd, 0, 0, NamesBegin,
68 NamesEnd);
69 }
70